This paper gives an overview of early Australian computing milestones up to about 1970 and demonstrates a mesh of influences. Wartime radar, initially from Britain, provided basic experience for many computing engineers. UK academic Douglas Hartree seems to have known all the early developers and he played a significant part in the first Australian computing conference. John von Neumann's two pioneering designs directly influenced four of the first Australian machines, and published US designs were taken up enthusiastically. Influences passed from Australia to the world too. Charles Hamblin's Reverse Polish Notation influenced English Electric's KDF9, and succeeding stack architecture computers. Chris Wallace contributed to English Electric, and Murray Allen worked at Control Data. Of course the Australians influenced each other: Myers, Pearcey, Ovenstone, Bennett and Allen organized conferences, interacted on projects, and created the Australian Computer Societies. Even horse racing played a role.